A signal separation device for acquiring a source signal from a mixed signal observed by a plurality of sensors includes: a database that stores feature information of a clean signal; separation matrix calculation means for repeatedly performing processes of, based on a separated signal obtained by multiplication of a mixed signal converted into a time-frequency representation by a separation matrix and on the feature information stored in the database, calculating a parameter to be used for an objective function for optimizing the separation matrix, and calculating a separation matrix for minimizing the objective function using the parameter; and output means for outputting a separated signal calculated using the optimized separation matrix obtained by the separation matrix calculation means.
Legal claims defining the scope of protection, as filed with the USPTO.
2. The signal separation device according to claim 1, wherein the separation matrix calculator identifies a power spectrum of the clean signal that is a nearest neighbor of a power spectrum of the separated signal for each discrete time by searching the database, and sets the parameter using an element of the identified power spectrum of the clean signal.
4. The signal separation method according to claim 3, wherein in the separation matrix calculation step, the signal separation device identifies a power spectrum of the clean signal that is a nearest neighbor of a power spectrum of the separated signal for each discrete time by searching the database, and sets the parameter using an element of the identified power spectrum of the clean signal.
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October 1, 2019
March 5, 2024
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